<template>
	<view>
		<view class="search-box"> <uni-search-bar :radius="100" @confirm="search" @input="input" placeholder="请输入内容" cancelButton="none"></uni-search-bar> </view>

		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDeatail(item)">
				<view class="goods-name">{{ item.goods_name }}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>

		<view class="history-box" v-else>
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
			</view>
			<view class="history-list"> <uni-tag v-for="(item, i) in historys" :key="i" :text="item" @click="gotoGoodsList(item)"></uni-tag> </view>
		</view>
	</view>
</template>

<script>
export default {
	data() {
		return {
			timer: null,
			kw: '',
			searchResults: [],
			historyList: ['a', 'b']
		}
	},
	onLoad() {
		this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
	},
	methods: {
		input(e) {
			clearInterval(this.timer)

			this.timer = setTimeout(() => {
				this.kw = e.trim()
				this.getSearchList()
			}, 500)
		},
		// 根据搜索关键词，搜索商品建议列表
		async getSearchList() {
			// 判断关键词是否为空
			if (this.kw === '') {
				this.searchResults = []
				return
			}
			// 发起请求，获取搜索建议列表
			const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
			if (res.meta.status !== 200) return uni.$showMsg()
			this.searchResults = res.message

			this.saveSearchHistroy()
		},
		gotoDeatail(item) {
			uni.navigateTo({
				url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
			})
		},
		saveSearchHistroy() {
			// this.historyList.push(this.kw)

			// 1. 将 Array 数组转化为 Set 对象
			const set = new Set(this.historyList)
			// 2. 调用 Set 对象的 delete 方法，移除对应的元素
			set.delete(this.kw)
			// 3. 调用 Set 对象的 add 方法，向 Set 中添加元素
			set.add(this.kw)
			// 4. 将 Set 对象转化为 Array 数组
			this.historyList = Array.from(set)
			// 调用 uni.setStorageSync(key, value) 将搜索历史记录持久化存储到本地
			uni.setStorageSync('kw', JSON.stringify(this.historyList))
		},
		cleanHistory() {
			// 清空 data 中保存的搜索历史
			this.historyList = []
			// 清空本地存储中记录的搜索历史
			uni.setStorageSync('kw', '[]')
		},
		gotoGoodsList(kw) {
			uni.navigateTo({
				url: '/subpkg/goods_list/goods_list?query=' + kw
			})
		}
	},
	computed: {
		historys() {
			return [...this.historyList].reverse()
		}
	}
}
</script>

<style lang="scss">
.search-box {
	position: sticky;
	top: 0;
	z-index: 999;
}

.sugg-list {
	padding: 0 5px;
	.sugg-item {
		display: flex;
		justify-content: space-between;
		align-items: center;
		font-size: 12px;
		padding: 13px 0;
		border-bottom: 1px solid #efefef;

		.goods-name {
			white-space: nowrap;
			overflow: hidden;
			text-overflow: ellipsis;
		}
	}
}

.history-box {
	padding: 0 5px;
	.history-title {
		display: flex;
		justify-content: space-between;
		height: 40px;
		align-items: center;
		font-size: 16px;
		border-bottom: 1px solid #efefef;
	}

	.history-list {
		display: flex;
		flex-wrap: wrap;

		.uni-tag {
			margin-top: 5px;
			margin-right: 5px;
		}
	}
}
</style>
